What is string and its types?
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Explain aggregation in java?
What is a key in java?
What is the purpose of using break in each case of switch statement?
Make a data structure and implement an algorithm to print all the files in a directory. (The root directory can have sub-directories too.)
Does java have extension methods?
When we will use an Interface and Abstract class?
How strings are created in java?
What are the types of relation?
How does hashset works in java?
What do you know about the garbage collector in java?
Does java support multiple inheritances?
What is the difference between DataInputStream and BufferedReader